Isekai Ojou-sama

Touka, the sole heiress to the Tsukizakura Conglomerate and the wealthiest woman on Earth, meets an untimely end in a sudden accident. Instead of fading into nothingness, she awakens in Megalanica, a strange and unforgiving parallel world. Her arrival offers no reprieve, as she is swiftly captured by a tyrannical king and condemned to a life of slavery. With her freedom stripped away, her fate appears permanently sealed—until she manages to activate her unique Authority: Gravebank, the Bank of the Underworld. Upon its awakening, Touka discovers that this otherworldly ledger holds an incomprehensible balance of seventy quadrillion yen. Wielding this staggering fortune as her ultimate weapon, she immediately purchases her own emancipation from bondage. However, her ambitions extend far beyond personal survival. Driven by a fierce resolve, she dedicates herself to liberating others who suffer under the same oppressive chains. Assembling a growing party of freed companions at her side, Touka embarks on a grand campaign fueled entirely by limitless capital. Her objective is unprecedented: to buy the world itself piece by piece and topple the demon kings who rule over it. In a realm where power is typically measured by magic or might, she intends to prove that absolute wealth can conquer all.